but at the risk of incurring a further penalty of doubling their current losses. If the outcome of this gamble is positive (“chase-win”), the loss is recovered and the round ends. If the outcome is negative (“chase-loss”), the loss is doubled and participants are given another chance to quit or chase in the next round of the game. In this way, participants played an enforced “Martingale” system. Campbell-Meiklejohn and colleagues (2008) used fMRI to identify the neural substrates associated with such decisions to chase losses or quit.
